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AysviL [449]
3 years ago
11

Which are solutions of the equation (x + 5)(x – 3) = 0? Check all that apply. x = –15

Mathematics
2 answers:
Natali [406]3 years ago
4 0

Answer:

x= -5 and x= 3

Step-by-step explanation:

You have the factored equation, all you need is to switch the signs on the numbers and that is the answer.

Likurg_2 [28]3 years ago
3 0

Answer:

x = -5 and x = 3

Step-by-step explanation:

It's a quadratic so it has two answers

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Describe and correct the error in finding the tenth term of the arithmetic sequence 4, 12, 20, 28.
ycow [4]

Answer: The tenth term is 76

=======================================================

Explanation:

We use this arithmetic sequence formula to get the nth term

a_n = a_1 + d(n-1)

Plug in a_1 = 4, \ d = 8, \ n = 10 and you should get the following:

a_n = a_1 + d(n-1)\\\\a_{10} = 4 + 8(10-1)\\\\a_{10} = 4 + 8(9)\\\\a_{10} = \textbf{76}\\\\

The tenth term is <u>76</u>

---------

We can verify this by listing out the terms one by one. Start at 4, add on 8 each time, until you generate the 10th term. A table like the one shown below is a good way to keep track of all the terms.

\begin{array}{c|c}\boldsymbol{n} & \boldsymbol{a_n}\\1 & 4\\2 & 12\\3 & 20\\4 & 28\\5 & 36\\6 & 44\\7 & 52\\8 & 60\\9 & 68\\10 & \textbf{76}\\\end{array}

---------

In short, the error is with the "10" in the expression 4+10(8). The student should have used 9 instead. This is because of the n-1 term in a_n = a_1 + d(n-1) which shifts everything one spot to the left.

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2 years ago
Ellen has 60 feet of craft wire.She plans to cut it into pieces that are each 3 meters long.What is the greatest number of 3-met
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Write a system of linear inequalities to represent each graph.
Ostrovityanka [42]

5. The blue one is y >= 5x - 7

and green is y >= -0.65x + 3

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3 0
3 years ago
Can somebody help me with this question
natta225 [31]
First, we know that y is equal to -8x, so we can move the -8x to replace y in the first equation, then in the first equation we get -8x=6x-14, subtract 6x on both sides, -14x=-14, x=1
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Five percent of 1/5 is equal to
blagie [28]

1/5 =

Percent = 20%

Decimal = 0.2

-StarGaze

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3 years ago
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